Do I have to register every time I open Tubi? As long as you don't log out, you only have to go through the registration (sign-up or login) process one time per device. Afterward, you won’t see the sign-up screen any longer. Related articles How to Sign In Signing into Tubi with an activation code How to sign up How to sign into your Tubi account How do I register for Tubi? Still need help? Contact Us